<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <div id="app">
        <!-- <h2 :style ="{key(属性名)：value(属性值）}">{{message}}</h2> -->
        <!-- <h2 :style ="{fontSize:'20px'}">{{message}}</h2> -->
        <!-- <h2 :style ="{fontSize:finalSize +'px',color:finalColor}">{{message}}</h2> -->
        <h2 :style ="getStyles()">{{message}}</h2>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app = new Vue({
            el:'#app',
            data:{
                message:'你好呀！',
                finalSize:100,
                finalColor:'red'
            },
            methods:{
                getStyles: function(){
                    return   {fontSize:this.finalSize +'px',color:this.finalColor}
                }
               
            }
        })
    </script>
</body>
</html>